Resultant forces will cause acceleration, which can be described and calculated using Newton's laws of motion. Weight is caused by the gravitational effect of a planet attracting an object’s mass.
Which word describes the forces on an object moving at a constant speed?
If a resultant force acts on an object, what happens to its motion?
There is no change in speed
The object accelerates in opposite direction to resultant force
The object accelerates in same direction as resultant force
Which of these statements about Newton's Third Law of motion is correct?
The forces are always contact forces
The forces act on the same object
The forces act on two different objects
Why might an air track be used in the acceleration experiments?
To reduce friction
To ensure the glider travels in a straight line
To be able to attach the pulley
Which of these is not a hazard in the acceleration experiments?
Burns from hot apparatus
Electrical fault with the equipment
Masses falling to the floor
What is the relationship between acceleration and mass?
Acceleration is directly proportional to mass
Acceleration is inversely proportional to mass
Acceleration and mass are not proportional
What is the correct equation for calculating weight?
W = m ÷ g
W = g ÷ m
W = m g
What is the relationship between the weight of a body and the gravitational field strength?
Weight is directly proportional to gravitational field strength
Weight is inversely proportional to gravitational field strength
Weight is not proportional to gravitational field strength
What is the acceleration of a 420 g object subject to a 15 N resultant force?
What is the definition of inertial mass? - Higher
The ratio of force over acceleration
The effect of gravitational attraction on a weight
The weight of an object in deep space, very far from any gravitational fields